What is going on!!!!

C

crout

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Rosemary, AB
I had kind of a frustrating day at the range with my 6.5x55. i had loaded up soome 140gr amax which i removed the moly from via tumbler, I was also using federal 210M primers and H4831. I loaded up in 0.3gr incriments upto 47.1gr but never fired them or the 46.8gr load due to cratered primers. pictures speak for themselves but incase you need to know, first group was in a verticle string next was in a horizontal string then it got interesting. 3 shots and 2 holes but the 2nd hole is like 1"+ away(picture included), then next group, 3 shots and 2 holes and same thing another flier 1"+ away(picture included). then a 3 shot group measuring 0.8" and then a group where 2 bullets touch and then a flier 1.5"+ away?????????????? the flier is always the last shot but i didn't pull any shots.

what am i doing wrong? I use a lee collet neck sizer, forester ultra br seater and i seated the bullets to +- .001" of each other. measured using a bullet comparator. I seated to just touch the lands.

the only thing i can think of is maybe a bit of corncob media left in the case after tumbling, but what are the odds it's always the last case?

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Assuming you have a heavier barrel 3rd groups shouldn't be a problem without heat issues.

Go through your shooting form and be brutally honest with yourself. If I don't focus on what I'm doing I find that I will usually be the biggest reason as to why my rifle isn't grouping well.

If that is all good it could be afew things. It could just be that your rifle doesn't like that bullet/powder. I have found that A-maxs shoot pretty well with some jump. Quite possibly as you started moving up in powder charge you may have been getting some pressure spikes do to the bullets being up into the lands.
 
What rifle are you shooting?

Always the last shot?

Consider doing 2- 2 shot groups/4 shots total, same target but let the barrel cool inbetween groups. Just shoot two and leave the rifle where it is for a few minutes.

Jerry
 
I shot some 155 gr Amax a few weeks ago out of my taget rifle. Three 10 shot groups in all with time for the barrel to cool in between. 10 shots touching the lands, 10 shots .010" off the lands and 10 shots .020" off the lands, everything else was the same. I found that .010" off the lands grouped the best.
I also did the same test with 155 Lapua's and .010" off the lands worked the best with them too. Every rifle is different, that is why we test.
 
I sure hope it's me and not my gear. could this be a bedding issue? I sure hope it's not a scope issue as it's a brand new sightron.
the rifle is my stevens with the shilen barrel on it. 0.98" dia
i just find it wierd that for 2 of the groups the bullet went into the same hole but then there was such a flier on the 3rd shot and yes it's always the 3rd shot. I can tell when i pull a shot and to the best of my knowledge i have not. But i very well could. It's pretty exciting when you shoot 2 bullets to the same spot and you get excited and hope the 3rd bullet goes where you want it.
 
Definitely bedding can be an issue but mechanical problems are usually not predictable.

If you had a scope, bedding or other mechanical issue, you would throw shots at random. Always the last of 3 shots leads me to consider shooter error.

Best thing I can suggest is shoot 2 two rds groups or just relax and drive that third one into the hole.

The barrel, scope and set up will be very accurate. You just need to get past that first bughole group. Relax, it will happen then will happen more often as you gain confidence.

How about letting someone else try a few groups?
Jerry
 
mysticplayer said:
Definitely bedding can be an issue but mechanical problems are usually not predictable.

If you had a scope, bedding or other mechanical issue, you would throw shots at random. Always the last of 3 shots leads me to consider shooter error.

Best thing I can suggest is shoot 2 two rds groups or just relax and drive that third one into the hole.

The barrel, scope and set up will be very accurate. You just need to get past that first bughole group. Relax, it will happen then will happen more often as you gain confidence.

How about letting someone else try a few groups?
Jerry
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all sounds good to me. especially the extra shooter.
so should i load up and do it all again or should i stick with first 2 groups and try some different seating depths as well?
 
Try shooting some 5 shot groups. See if you get one flier out of 5 or if it rounds out the group. Maybe let the barrel cool a couple of minutes between each shot so each one is being fired out of a consistent temperature barrel.
Kimzter
 
crout said:
should i load up and do it all again or should i stick with first 2 groups and try some different seating depths as well?
Click to expand...

I'd load up again exactly as I had before, then shoot two groups of two. I wouldn't play with seating depths just now- why introduce another variable? Get this problem sorted out first.
 
As was just said, load up again but have 6 rds or so especially with the loads that you feel shot best.

You need to get a feeling on where the nodes and potential accuracy lies. Sometimes it takes a few trips to get a baseline.

I am working with my new 260AI barrel. Got some promising 200yds loads but they have not been as good at 350yds. So I am fine tuning at this range as this is how far out many of my matches are. Unfortunately, we got gales winds on so data is far from reliable but I am getting a good idea of where the pressure limits and sweet spots are.

I usually don't bother adjusting seating depths prefering to use very small powder increments to do the same thing. I usually seat 10 thou off the lands and leave it.

If you get some loads that do shoot well, try and get 3 to 5 groups to ensure it is consistent. From there, I would just go have some fun cause you already know it shoots.

Jerry
 
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